Friction-clutch.



No. 683,563. Patented Oct. I, I90].

F. LEHMANN'.

FRICTION CLUTCH.

(Application filed Fab. 6; 1901. (No Model.) 2 Sheets-Sheet l.

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No. 683,563. Patented 00%. I, 19m. r. LEHMANN.

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(Application filed Feb. 6, 1801.) (No Model.) 1 2 Sheets-Sheet 2.

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UNITED STATES PATENT OFFICE.

FRIEDRICH LEHMANN, OFLEIPSIC-EUTRITZSOH, GERMANY.

FRICTION-CLUTCH.

SPECIFICATION forming part of Letters Iatent No. 683,563, dated October 1,1901,

Application flled February 6, 1901. serial No. 46,255. (No model.)

To all whom it may concern.-

Be it known that I, FRIEDRICH LEnMANN,-a subject of the Emperor of Germany, residing at Leipsic-Eutritzsch, German Empire, have invented an Improved Friction- Clutch, of which the following is a specification.

The following invention consists of a new and improved friction-clutch, by means of which the friction elements can be brought into the firmest possible gripping position by a simple and easy manipulation.

In the accompanying drawings, in which similar letters of reference refer throughout to similar parts, Figure 1 illustrates in sectional elevation a friction-clutch embodying the present invention. Fig. 2 is a partiallybroken-away front view of Fig. 1.

The clutch-disk f is centrally provided with I the well-known sleeve, through which the shaft is adapted to pass. Mounted on said sleeve is a sliding ring a, carrying the link I), to which is pivotally connected one end of a bent lever c. The upper end of said lever terminates in a boss d, provided with both a longitudinal and a transverse opening. The boss aforesaid is provided with trunnions g on both its sides and pivoted therewith in a fork e, fastened on said disk fby a screw f,

said trunnions g thus forming the fulcrum of the bent lever aforesaid. In the transverse opening in said boss at spindle h is mounted, which is provided on its opposite ends with right and left threads, engaging which latter are nuts 1' and 7t. Links Z and Z are pivotally connected with said nut 11 at their lower ends, while at their upper ends they engage the outer cheek m. (See Fig. 1.) Similar links 0 and o are employed for connecting nut is and the inner check 1), Mounted in the longitudinal opening aforesaid in boss (1 is a set-screw r, bearing with its inner end on said spindle. Suitable friction-shoes n and q are mounted in their respective cheeks and are, as is obvious, adapted to firmly engage on the opposite sides an annular flange .9, formed on the driving member I, when by loosening screw r the spindle h is turned so as to draw the shoes against the flange aforesaid. When thus turning said spindle, it is obvious that it slideswithin the boss cl, and thereby automatically changes its pivot, so as to assume at all times its proper position in the boss d. The clutch having been suitably adjusted, the screw 1' is again screwed in, thereby holding spindle h in its proper position.

In place of spindle 71. I may employ any modified form of construction of a lever or arm which permits the respective necessary movement of the shoes aforesaid.

Having now described the invention, what I claim as new, and desire to protect by Letters Patent, is-

In a friction-clutch the combination of a disk, a fork thereon, a lever pivoted therein, a boss on said lever, a spindle therein having right and left threads on its opposite ends, nuts engaging said threads, links connected with said nuts, friction-shoes connected respectively with said links a wheel, an annular flange thereon extending between said shoes and a set-screw in said boss engaging said spindle substantially as described.

FRIEDRICH LEHMANN.

I Witnesses:

RUDOLPH FaIoKE, CHAS. J. BURT. 

